:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --border-color: #2a2a3a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav { display: flex; gap: 24px; align-items: center; }
.nav a { color: var(--text-secondary); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.nav a:hover, .nav a.active { color: var(--text-primary); }

.btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--border-color); }
.btn-danger { background: var(--error); color: white; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

.main { max-width: 1200px; margin: 0 auto; padding: 40px 24px; }

.hero { text-align: center; padding: 80px 0; }
.hero h1 {
    font-size: 48px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff, #a0a0b0);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p { font-size: 20px; color: var(--text-secondary); max-width: 600px; margin: 0 auto 32px; }

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}
.card h2 { font-size: 20px; margin-bottom: 16px; }
.card h3 { font-size: 16px; margin-bottom: 12px; color: var(--text-secondary); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-secondary); }
.form-group input, .form-group select {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}
.form-group input:focus { outline: none; border-color: var(--accent); }

.auth-container { max-width: 400px; margin: 80px auto; }
.auth-tabs { display: flex; margin-bottom: 24px; }
.auth-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    background: var(--bg-tertiary);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
}
.auth-tab:first-child { border-radius: 8px 0 0 8px; }
.auth-tab:last-child { border-radius: 0 8px 8px 0; }
.auth-tab.active { background: var(--accent); color: white; }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}
.stat-card .label { font-size: 14px; color: var(--text-muted); margin-bottom: 8px; }
.stat-card .value { font-size: 32px; font-weight: 700; }
.stat-card .value.balance { color: var(--success); }

.keys-table { width: 100%; border-collapse: collapse; }
.keys-table th, .keys-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border-color); }
.keys-table th { color: var(--text-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }

.key-value {
    font-family: monospace;
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
}
.key-actions { display: flex; gap: 8px; }

.status-badge { padding: 4px 8px; border-radius: 4px; font-size: 12px; }
.status-badge.active { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.status-badge.inactive { background: rgba(239, 68, 68, 0.2); color: var(--error); }

.pricing-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.pricing-table th, .pricing-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border-color); }
.pricing-table th {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    position: sticky;
    top: 0;
}
.pricing-table tr:hover { background: var(--bg-tertiary); }

.provider-badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.provider-openai { background: rgba(16, 163, 127, 0.2); color: #10a37f; }
.provider-anthropic { background: rgba(204, 150, 96, 0.2); color: #cc9660; }
.provider-google { background: rgba(66, 133, 244, 0.2); color: #4285f4; }
.provider-xai { background: rgba(255, 255, 255, 0.2); color: #ffffff; }
.provider-meta { background: rgba(0, 136, 255, 0.2); color: #0088ff; }
.provider-mistral { background: rgba(255, 119, 0, 0.2); color: #ff7700; }
.provider-deepseek { background: rgba(99, 102, 241, 0.2); color: #6366f1; }
.provider-cohere { background: rgba(255, 87, 51, 0.2); color: #ff5733; }
.provider-free { background: rgba(16, 185, 129, 0.2); color: var(--success); }

.code-block {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre;
}
.code-block .comment { color: #6a737d; }
.code-block .string { color: #a5d6ff; }
.code-block .key { color: #7ee787; }

.tabs { display: flex; gap: 4px; margin-bottom: 24px; border-bottom: 1px solid var(--border-color); }
.tab {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-content { display: none; }
.tab-content.active { display: block; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 48px 0;
}
.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
}
.feature-card h3 { font-size: 18px; margin-bottom: 12px; }
.feature-card p { color: var(--text-secondary); font-size: 14px; }

.balance-section { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active { display: flex; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: rgba(239, 68, 68, 0.2); color: var(--error); border: 1px solid var(--error); }
.alert-success { background: rgba(16, 185, 129, 0.2); color: var(--success); border: 1px solid var(--success); }

.copy-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    margin-left: 8px;
}
.copy-btn:hover { background: var(--border-color); }

@media (max-width: 768px) {
    .balance-section { grid-template-columns: 1fr; }
    .hero h1 { font-size: 32px; }
    .nav { display: none; }
}